Apparatus for extracting grease and oils from garbage.



APPLICATION FlLED DEC. 2, |916.

Tfatenten Feb. 11, 191%).

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APPARATUS FORl EX'VTRACTVING GREASE AND OiLSF APPLICATION FILED DEclz,|916.

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C. EDGERTON. APPARATUSYFOH EXTHACTING GREASE AND OILS FROM GARBAGE.

APPUCATIDN FILEII!l DEC. 2\ 1916.

Patented Feb. 11, 19179.

4 SHEETS-SHEET 3 WHW/mso C. DRN.A APPARATUS FOR EXTRACUNG GREASE ANDOILS FROM GARBAGE. APNIC/NUN man 051:.2. 1915.

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rfns Parnu' CHARLES EDGERTON, F PHILADELPHIA, PENNSYLVANIA.

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Specication of Letters Patent.

Application filed December 2, 1916. Serial No. 134,650.

To all whom t may concern.'

Be it known that I, CHARLES EDGERTON, a citizen of the United States,and resident of Philadelphia, county of Philadelphia, State ofPennsylvania, have invented certain new and useful Improvements inApparatus for Extracting Grease and Oils from Garbage, of which thefollowing is a specification.

This invention relates to apparatus for use in extracting grease and oilfrom garbage and has particular reference to improvements in theapparatus shown and described in my copending application Serial No..

101,565, led June 3, 1916. The garbage is treated in the apparatus witha suitable solvent such as naphtha. Liquid grease and oil are thenwithdrawn and the remaining material is subjected to the action of heatto drive off the eXcesssolvent and moisture to produce a fertilizer.

One of the objects of the present invention is to arrange the steamheating coils, fittings and headers so that they will not in any wayinterfere with the agitation of the contents of the receptacle, and alsoso that these parts will be more easily accessible for repairs.

Another object of the invention is to provide a depression or trough inthe false bottom of the tank to receive heavy foreign substances such asglass, nails, etc. which are often found in garbage.

The above and other objects and the novel features of the invention willbe apparent from the following description taken in connection with thedrawing in which,

Figure l is a side view of an apparatus embodying the invention, partsbeing broken away to disclose the construction of the interior;

Fig 2 is a plan view of the same, with parts broken out to show detailsof construction' Fig. 3 is a central sectional view of the apparatustaken on the line 3 3 of Fig. 2;

Fig. 4 is a plan View showing a portion of another apparatus embodyingmy invention;

Fig. 5 is a cross sectional View taken on the line 5-5 of Fig. 4, and

Fig. 6 is a. plan view of a portion of another apparatus embodying theinvention.

The apparatus for treating garbage comprises a tank-like receptacle inthe form of a metal shell built so as to sustain considerable inner andouter pressure. The shell is made up of a vertical cylindrical wall 10which has a dome-like top wall 11 and a dish-like bottom wall 12 securedto it by rivets, the joints between these parts being easily accessiblefor calking or repairing. The bottom 12 carries beams 13 on its interiorand a false bottom is supported on channel members 14 resting on thebeams 13. The false bottoni consists of a plurality of superposedperforated plates or screen-like members, the lower member 15 beingfastenedto the channel members 14 and the upper screen-like member 16being movable with respect to the fixed member 15. The screen-likemembers 15 and 16 are provided with perforations which may be moved intoand out of register to provide a perforate or an imperforate falsebottom as required during the treatment of the garbage. While thegarbage is being subjected to the action of the solvent the perforationsin the screenlike members register with each other so that the solventmay flow through the false bottom into the basin formed by the bottom 12from which it may be drawn oli" through the coupling 17.

Any suitable means may be provided for effecting the required relativeadjustment between the screen-like members 15 and 16. In Fig. 1 I havedisclosed al rod 18 which extends through the wall 10 of the shell andis provided at its inner end with means for engaging the top plate 16 togive it a slight turn about its pivot 24 to move the perforations intoor out of registration.

The material to be treated is charged into the receptacle through a door2O in the top 11 and suitable sight openings 21 are also provided in thetop to enable the operator to observe the progress of the action withinthe tank. Other openings are provided for withdrawing the gasesgenerated in the receptacle. The receptacle is provided with an outletdoor 22 in the side wall 10 and just above the false bottom throughwhich the finished material is discharged. The door 22 is also ofsutlicient size to permit the withdrawal of the parts within the tank sothat these parts may be repaired or replaced.

The material within the tank is agitated while it is treated so as tocirculate the solvent through the body of garbage and also to separateout heavy foreign substances such as glass, iron, stones, etc., whichare undesirable since the garbage after its treatment is suitable foruse as a stock food or as a fertilizer. The agitating mechanismcomprises rotating blades 23 which are carried Patented Feb. 11, 1919.

on the lower end of a shaft 24 which is supported at its lower end on abearing 25 and extendsupwardly through the top 11 and is mounted in asuitable bearing thereon. The shaft 24 is driven by means of two bevelgears 27 and 28 connected by suitable shafting and gearing to a drivingpulley 29. A loose pulley 30 is also carried on the same shaft with thedriving pulley 29 to release the agitating mechanism. A sleeve 31surrounds the shaft 24 and keeps rags and similar materials frominterfering with the operation of the agitating means. The blades 23extend to the margin of the plates 15, 16 and move immediately overthem. The arm 23 may also be used for discharging the finished productthrough the door 22.

The glass, nails, stones and similar foreign substances in the garbagegradually sink tothe bottom of the tank while the material is beingagitated, and are worked out to the periphery of the plates 15, 16constituting the false bottom. An annular trough 32 is located at themargin of the plates 15, 16 and is supported at one edge on the channel14 and at the other edge on a suitable angle iron 33. The trough 32 thusconstitutes a depressio-n below the level of the false bottom and willcollect the heavier substances and, being perforated, the excess liquidwill drain therefrom. When the treatment of the garbage is finished thedesirable portion thereof may be swept out of the tank over the materialin the trough by the blades 23. Then a suitable blade 34 may be attachedto the end of a blade 28 to sweep the foreign material in the trough 432to the front of the tank where it may be removed through the door.

During the treatment and agitation of the garbage in the tank it issubjected to heat to drive off the excess moisture and solvent. Heatingcoils 35 are supported on the beams 13 below the screen-like member 15and are supplied with steam through the pipes 36 and 37. Two sets ofsegmental, nearly semicircular heating coils 88 are arranged on theoutside of the vertical cylindrical wall 10. The heating coils 88substantially conform to the curvature of the wall 10, are horizontallyarranged and at their ends they are connected to vertical headers 39byfittings 40. In the constructions shown in Figs. 1, 2 and 3, theheating coils 38, headers 39 and fittings 40 are entirely outside of thecylindrical wall 10 which gives a continuous uninterrupted surface onthe inside of the tank so that there will be no parts in the way tointerfere with the agitation operation. A covering 41 of suitable heatinsulating material is built up around the steam coils 38, headers 39and fittings 40 to prevent a waste of heat. The coils, headers andfittings being entirely on the outside of the tank will be more easilyaccessible for repairs than in the construction shown in my copendingapy plication.

In the form of my invention shown in Figs. 4 and 5, the heating coils381, headers 391 and fittings are disposed within the outsidecylindrical wall 10 but a vertical cylindrical wall 101 is placedagainst the inner side of the heating coils and headers and adjacent theouter edge of the perforated trough 32. The shield or wall 101 issectional so that it may be taken apart to get access to the coils andheaders for repairs. This wall 101 also serves to reduce the friction ofthe moving body of garbage during agitation.

In the form shown in Fig. 6 the segmental coils 382 are disposed withinthe cylindrical wall 10 but the headers 392 and fittings 402 are outsideof this wall so that the connections will be more easily accessible forrepairs. The space between the coils at the front and rearris bridged bymeans of segmental plates 42 to make the inner surface more continuousand reduce the friction of the moving body of garbage. In other respectsthe constructions shown in Figs. 4, 5, and 6 are similar to theconstructions shown in Figs. 1 to 3.

While the apparatus is shown and described in detail it is to beunderstood that various changes may be made in the construction withoutdeparting from the spirit of the invention.

Having thus described the invention, what is claimed and desired to besecured by Letters Patent is:

1. In an apparatus of the class described, the combination of atank-like receptacle having a vertical cylindrical wall, and means forheating said receptacle and the contents thereof comprising a series ofcoils, and headers to which the ends of said coils are connected, saidheaders being located outside said vertical wall.

2. In an apparatus of the class described, the combination of atank-like receptacle having a vertical cylindrical wall, and means forheating said receptacle and the contents thereof comprising a series ofsegmental steam coils adjacent said wall and coinforming to thevcurvature thereof, and vertical headers connected to the ends of thecoil .and located outside of said cylindrical wal. l

3. In an apparatus of the class described, tie con'xbination of atank-like receptacle having a vertical cylindrical wall, a false bottomwithin said receptacle, and means for heating said receptacle and thecontents thereof above the fase bottom comprising two sets of horizontalsegmental steam coils adjacent said wall and above said false bot-l tom,and vertical headers connected to the ends of the coils and locatedoutside of said cylindrical wll.

4. In an apparatus of the class described,the combination of a tank-likereceptacle having a vertical cylindrical wall, and means for heatingsaid receptacle and the contents thereof comprising two sets ofhorizontal steam coils outside said wall and conforming to the curvaturethereof, and headers connected to the ends of the coils and locatedoutside of said wall.

5. In an apparatus of the class described, the combination of atank-like receptacle having a vertical cylindrical wall, means forheating said receptacle and the contents thereof, comprising two sets ofhorizontal segmental steam coils outside said wall and conforming to thecurvature thereof, vertical headers connected to the ends of the .coils,and a covering of heat insulating material fo-r said coils.

6. In an apparatus of the class described, the combination of atank-like receptacle having a vertical cylindrical wall, means forheating said receptacle and the contents thereof comprising two sets ofsegmental steam coils outside said wall and conforming to the curvaturethereof, headers connected to the ends of the coils and located outsideof said cylindrical wall, and a protecting covering of insulatingmaterial for said coils and headers.

7 In an apparatus of the class described,Y the combination of atank-like receptacle having a vertical cylindrical wall and a falsebottom, means for heating said receptacle and the contents thereofcomprising two sets of segmental steam coils extending around theoutside of said wall above said false bottom, vertical headers connectedto the ends of the coils and located outside of said cylindrical wall,and a protecting covering of insulating material surrounding the coilsand headers.

8. In an apparatus of the class described, the combination of atank-like receptacle having a bottom provided with apertures, means toopen and close said apertures, agitating means within the receptacleabove the bottom thereof, and a depression in the bottom of thereceptacle to receive heavy solid substances which sink to the bottomwhen the garbage treated in said receptacle is agitated.

9. In an apparatus of the class described, the combination of atank-like receptacle, a false bottom within said receptacle, agitatingmeans within the receptacle above the false bottom, and an annulardepression in the false bottom at the margin thereof to receive heavyforeign substances collecting in the bottom when the contents of thereceptacle are agitated.

10. In an apparatus of the class described, the combination of atank-like receptacle having 4a vertical cylindrical wall and a falsebottom, means for agitating the contents of the receptacle above saidfalse bottom, and a perforated annular trough at the margin of the falsebottom to Vreceive foreign substances which sink to the bottom when thecontents of the receptacle are agitated.

11. In an apparatus for treating garbage, the combination of a tank-likereceptacle, a false bottom Within said receptacle comprising a pluralityof superposed relativelyA adjustable screen-like members, means foragitating the contents of the receptacle above the false bottom, and aperforated annular trough in said false bottom adjacent the margin ofsaid screen-like members.

12. In an apparatus for treating garbage, the combination of a tank-likereceptacle havingavertical cylindrical wall and a false bottom, a doorin said cylindrical wall above the false bottom, a depression in thefalse bottom to receive foreign substances contained in the garbage, andmeans for agitating the contents of the receptacle above the falsebottom and also for discharging all the treated garbage from saidreceptacle except the substances in said depression.

13. In an apparatus for treating garbage, the combination of a tank-likereceptacle having a cylindrical wall, a false bottom within saidreceptacle comprising a plurality of superposed relatively adjustablescreenlike members, said false bottom also having a perforated annulartrough at the margin of said screen-like members adapted to receiveheavy foreign substances contained in 100 the garbage, a door in saidwall above the false bottom, and means for agitating the contents of thereceptacle above the false bottom and also for discharging from thereceptacle all of the material on the false 105 bottom except thesubstances in said trough.

14. In an apparatus for treating garbage, the combination of a tank-likereceptacle having a vertical wall provided with a door,

a false bottom in said receptacle below said 110 door, an annular troughin said false bottom to receive foreign substances contained in thegarbage, means for agitating the contents of the receptacle above thefalse bottom and also for discharging therefrom all 115 of the materialon the false bottom except the foreign substances in the trough, andmeans for clearing the foreign substances from the trough.

In testimony whereof I aiix my signa- 120 ture.

CHARLES EDGERTON.

Witness RUSSELL MORITZ.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

